
Tankless Water Heaters in Hallowell, Maine
Endless Hot Water · Space-Saving Design · 20+ Year Lifespan
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Tankless Water Heaters for Hallowell Homeowners

Need tankless water heaters in Hallowell? Aces Highlands runs out of 508 Riverside St Unit 1 in Portland and covers Kennebec County routinely, which means a technician who already understands the area's homes and permit process shows up, not a stranger learning it on the job.
Tankless water heaters heat water on demand, providing endless hot water while saving space and energy. Aces Highlands installs propane and electric tankless systems properly sized for your household needs.
A tankless water heater heats water only when you need it, eliminating the standby energy loss of keeping a tank of water hot around the clock. This can reduce your water heating costs by 24-34% depending on your usage.
We install tankless units from trusted brands and ensure proper gas line sizing, venting, and water flow for optimal performance. Electric tankless models may require an electrical panel upgrade to support the higher amperage draw. Not every home is a good candidate for tankless — we evaluate your situation honestly and recommend the best option.
Tankless water heaters last 20+ years with proper maintenance, compared to 10-12 years for tank models. While the upfront cost is higher, the longer lifespan and energy savings make tankless a smart long-term investment for many homeowners. We offer financing to help spread the cost over time.
Why Hallowell Calls Aces Highlands
- A Kennebec County crew that already knows Hallowell's streets and housing stock
- A straight diagnosis and a clear price before we touch anything — no upsell
- Booking stays quick because we do not overbook the schedule
- Licensed and insured; Google reviewers back up the work
Hallowell Homes and What They Need
Hallowell's median home was built in 1938, with 57 percent of the city's housing dating before 1940 and 64 percent before 1960 -- the oldest stock of any of the four Kennebec towns Aces serves. Much of downtown and the residential blocks around it fall inside the Hallowell Historic District, listed on the National Register since 1970 and covering roughly 450 buildings, about half of them built before 1865. A rewiring job in that district usually means working carefully around original plaster and trim while still bringing the electrical up to code.
Water Supply and Drains in Hallowell
The Hallowell Water District supplies the city's water from gravel-packed wells located in neighboring Chelsea, not from wells within Hallowell itself, while sewer service runs through the Greater Augusta Utility District's plant in Augusta. Hallowell sits right on the Kennebec River, which has a documented history of spring flooding that has disrupted downtown businesses more than once. Homes closer to the river benefit from a sump and drainage check as part of any plumbing inspection.

Getting to Know Hallowell
Hallowell's first European settler, Deacon Pease Clark, arrived from Massachusetts in 1762, and the city takes its name from Benjamin Hallowell, a Boston merchant and one of the Kennebec Proprietors who backed its early development. Between 1783 and 1901, the city launched roughly 50 ships from its Kennebec wharves, part of an economy that also leaned on granite quarrying and ice exports.
In 1875, Hallowell became home to the Maine Industrial School for Girls, the state's first reform school for girls, which stayed open into the 1970s. Downtown still shows off its 19th-century commercial architecture, anchoring a historic district that gives Hallowell one of the best-preserved old riverfronts on the Kennebec.
Local & Independent — Not a Franchise
Aces Highlands answers to Hallowell homeowners directly, not a franchise office somewhere else in the country. Our technicians are not commissioned salespeople and nobody here is required to upsell you anything. We show up, fix the actual problem, and let the work speak for itself.
How a Tankless Water Heater Works
- Flow sensor — detects water flow and triggers ignition
- Burner — fires on demand, no standby tank
- Heat exchanger — heats the water as it passes through
- Hot water out — instantly, only when it's needed
- Compact — mounts on the wall, saves floor space
Homeowner Guide
Tankless Water Heaters: Sizing by Flow Rate, Not Gallons
A tankless water heater is sized completely differently from a tank, and misunderstanding that is the most common reason a homeowner ends up disappointed with one.
Read the Full GuideMore Water Heaters
Tankless Water Heaters is part of our full water heaters lineup. Explore the details or browse everything we offer in Hallowell.
Tankless Water Heaters DetailsAll Services in HallowellService Info
Codes & Permits for Tankless Water Heaters in Hallowell
In Hallowell, plumbing permits come from the Local Plumbing Inspector at the Hallowell Code Enforcement Office (1 Winthrop Street, Hallowell, ME 04347, (207) 430-4405 (office) / (207) 446-0316 (cell)). With 2,570 residents, Hallowell is under the 4,000-resident line at which Maine requires a town to enforce MUBEC. The city is bounded by the Kennebec River, which historically produced regular spring flooding that disrupted downtown commerce.
- Replacing or installing a water heater is plumbing work that falls under the town's Local Plumbing Inspector permitting and inspection process. mainelegislature.org
- Maine's 2021 energy code (IECC, part of MUBEC) requires insulation with an R-value of at least R-3 on 3/4-inch and larger hot-water piping inside conditioned space, and on recirculation piping, piping outside conditioned space, and buried piping. maine.gov
- A propane or natural gas-fired water heater installation or connection requires a Maine Fuel Board Propane and Natural Gas Technician license. mainelegislature.org
- Every Maine municipality must annually appoint at least one Local Plumbing Inspector (LPI), who does not have to live in that town, to issue plumbing permits and enforce the state's plumbing rules and Subsurface Wastewater Disposal (septic) rules locally. mainelegislature.org
How Aces Highlands Handles Tankless Water Heaters in Hallowell
- Hallowell Water District covers most of Hallowell (gravel-packed wells in Chelsea) — homes still on a private well get the well and pressure tank looked at as part of the same visit.
- Summit Natural Gas of Maine reaches parts of Hallowell, so a gas water heater is an option on those streets; propane, electric and heat-pump models work anywhere in town.
- The swap is permitted through the Hallowell Code Enforcement Office, the relief valve gets a proper gravity discharge line, and any gas connection is made under our Maine Fuel Board license.
A stone Romanesque-style public library on Central Street in Hallowell's historic downtown.
Street View © Google
Why homeowners choose Aces Highlands
We show up when we say
We show up on time, as promised, and complete the work with clean professionalism.
Pricing upfront, before work starts
Honest diagnostics and a clear price before any work begins — no surprises on the invoice.
Done right the first time
HVAC, plumbing and electrical done right the first time — backed by our workmanship guarantee and 100% satisfaction guarantee.
Locally owned in Portland, Maine · Serving Greater Portland and Southern Maine since 2019
What Water Heaters customers say
Nichole A
a year ago
Highly recommend! Cannot thank them enough for fixing my water heater. Elijah is very reliable and communicative. No hassle, no phone tag, transparent with cost and quick to repair the issue. I know who to call if I need help again!
Ruth Kirkwood
3 months ago
This company is excellent. They quickly and efficiently repaired the kitchen faucet that was loose.
John Walton
5 months ago
I've had three HVAC issues over the past two years. Each time I call, Elija or the office picks up the phone, and my problem is fixed in 24 hrs. Their solutions always feel correct and honest. I cannot recommend them more.
Adam Ayan
10 months ago
Elijah and Highlands Heating & AC were super helpful! Boiler failed over the weekend and Elijah was very responsive and helpful, getting us up and running right away. I would recommend him at HH&AC highly!
Justin Funk
a year ago
We highly recommend Highlands Heating & AC. They are extremely responsive, knowledgeable and do great work. Our boiler stopped working and Elijah was quick to respond after hours on a Friday. He installed a new boiler and heat pump hot water heater.
Tom
14 Aug 2024
He was very friendly. He gave me an honest explanation on why I shouldn't recharge my A/C unit and what he suggested made much more sense. He really took care of everything. He is very professional, always called me with updates. 5 stars is not enough — I give this company 10 stars.
Tankless Water Heaters FAQs
Does a tankless water heater really provide endless hot water?
Yes, within its flow capacity. A properly sized unit will run a shower indefinitely without going cold. The limit is simultaneous use — run three showers and a dishwasher at once and you can exceed its flow rate. That is why honest sizing for your household matters more than the brand.
How much does tankless water heater installation cost?
Nationally, installed costs typically run $2,500-$5,500 depending on fuel type, venting, and whether gas lines need upsizing — higher than a tank swap. The offset is a 20+ year lifespan and lower operating costs. We quote your exact price in writing before any work begins.
How long do tankless water heaters last?
Twenty years or more with annual descaling and basic care — roughly twice the life of a tank water heater. The heat exchanger is the key component, and keeping it free of scale is what gets you the full lifespan.
Does Maine’s cold groundwater affect tankless performance?
Yes, and it is the most important local factor. Winter inlet water in Maine can be 30+ degrees colder than in southern states, which reduces a unit’s effective flow rate. We size for Maine winter conditions so your system performs in January, not just on paper.
Will you talk me out of tankless if it is wrong for my home?
Yes — and we do it regularly. As a local company with no sales commissions, we have no reason to push the more expensive option. If your usage, fuel situation, or budget points to a quality tank heater instead, that is exactly what we will recommend.
More Services in Hallowell
Aces Highlands handles HVAC, plumbing, and electrical for Hallowell homeowners. Here is more of what we do nearby.
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EV Charger Installation in HallowellNeed Tankless Water Heaters in Hallowell?
Call our Hallowell team or get a free quote. We will get you scheduled and take care of it right the first time.
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